Steam-boiler.



M. W. SEWALL, DECD.

S. E. SEWALL, EXECUTRIX.

STEAM BOILER.

APPLICATION FILED JULY 30,1914.

l lmwfic Patent-ed May 25, 1915.,

@t ME MQ I i I v a snares PATENT crane.

MINOTT SEWALL, DECEASED, LATE OF NEW YORK, N. Y., BY SUSANN E. SEWALL,

EXECUTRIX, OF NEW YORK, N. Y., ASSIGNOR TO THE BABCOCK & WILCOX COM- IPANY, OF BAYONNE, NEW JERSEY, A CORPORATION OF JERSEY.

STEAM-BOILER.

Specification of Letters Patent.

Patented May 25, 1915.

1 Application filed July 30, 1914. Serial No. 854,155.

To all whom it may concern:

Be it known that MiNo'r'r W. SEWALL, late a citizen of the United States, and a resident of the city, county, and State of New York, did invent certain new and useful Improvements in Steam-Boilers, of which the following is a specification.

This invention relates to steam boilers and drums being connected by inclined banks of generating tubes 4, 5 and 6, respectively, with a mud drum 7. These parts are indicated only in outline, the construction being one well-known.

8 indicates the furnace. chamber at the 2 rear of which is a bridge wall 9.

Instead of the usual furnace arch, a rowof tubes 10 is introduced, which tubes are expanded at their inner ends into mud drum 7 and are inclined upwardly therefrom to a cross box or water chamber 11. The latter is supported in the front wall above the furnace door 12 parallel with and intermediate the levels of the upper and lower boiler drums, and is connected with the front drum 1 by .a row of substantially ver tical tubes 13. Extending from chamber 11, rearwardly, is a baffle 14 which terminates short of the mud drum 7 -so as to provide an opening for the escape ofthe gases from the furnace chamber into the secondary combustion chamber above the furnace roof. A

wall .15 supported on the tubes 13 prevents 1. Any suitable system of bafiiing may be employed to direct the gases along or among the generating tubes.

connecting said chamber with Instead of straight tubes connecting drum 1 and manifold 11, tubes 16, curved at their lower ends and entering manifold 11 at the side thereof alternately with the roof tubes 10, may be used, as shown in Fig. 2.

What is claimed and desired to be secured by Letters Patent of the United States is .1. A water tube boiler having upper transverse steam and water drums and a lower mud drum, banks of generating tubes connecting said drums, a transverse water chamber intermediate the levels of the upper and lower drums, a row of tubes connecting the mud drum and said chamber and extending over the boiler furnace, and a row of tubes one of the upper drums.

2. A' water tube boiler having aplurality of upper transverse steam and water drums and a lower mud drum, banks of generating tubes connecting said drums, a transverse Water chamber intermediate the levels of the upper and lower drums, a row of tubes conand a baffle extending from said vchamber rearwardly, said row of tubes and bafiie constituting the roof of the combustion chamber.

3. A water tube boiler having a plurality of upper transverse steam and water drums and a lower mud drum, banks of generating tubes connecting said' drums, a transverse water chamber intermediate the levels of the upper and lower drums, a row of tubes connecting the mud drum with said chamber, a bafile extending from said chamber rearwardly, said row of tubes and baflie constituting the roof of the combustion chamber, and a row of tubes connecting said chamber and the front steam and water drum.

In testimony whereof I have hereunto signed my hand in the presence of two subscribing Witnesses.

SUSANN E. SEWALL, E wecutrim of the-estate of Minott W.'Sewall,

deceased. I

Witnesses:

WELLS, E. P. TERRY. 

